Thor's chronology is missing his behind the scenes appearance in Justice vol. 1 #19b. I should also point out that what y'all have labeled in the MCP Key as Justice vol. 1 is really vol. 2 (the New Universe series from 1986-9).

As was common in the '40s & '50s, this series has a convoluted history.

DOPEY DUCK COMICS #1-2 ('45-'46) continued its numbering into:
WACKY DUCK COMICS #3-6 ('46-'47), which continued its numbering into:
JUSTICE COMICS #7-9 ('47-'48). Then, the numbering reset with its fourth actual issue under this title:
JUSTICE COMICS v2 #4-12 ('48-'49). Then, "COMICS" was dropped from the covers & indicia, but continued the numbering:
JUSTICE #13-52 ('48-'55), which then continued its numbering into:
TALES OF JUSTICE #53-67 ('55-'56).

I've seen various places list JUSTICE #13-52 still as "JUSTICE COMICS," and others list them as just "JUSTICE." As noted, "COMICS" was dropped from the covers & indicia with #13 (also #11, but it returned with #12, then from #13-on it was gone consistently). However, everyone seems to uniformly list issues #53-67 as "TALES OF JUSTICE," at least in the places I've seen.

Yeah, some of titles and numbering for those 40s and 50s series is weird and convoluted. Patsy Walker is mostly just listed as "Patsy Walker" in the indicia, but there are a few issues that randomly add "Comics" in the indicia (but not the cover). My favorite for weird is Best Western #58, whose title and numbering appears to carry over from Martin Goodman's pulp magazine of the same name which ended at vol. 5 #7. Absolutely bizarre! Here's a write-up on the whole matter that's very interesting: link.